Nonlinear time-domain modeling of balanced-armature receivers

Joe Jensen, Finn T. Agerkvist, James Harte

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Nonlinear distortion added by the loudspeaker in a hearing aid lowers the signal-to-noise ratio and may degrade the hearing aid user's ability to understand speech. The balancedarmature- type loudspeakers, predominantly used in hearing aids, are inherently nonlinear devices, as any displacement of the loudspeaker diaphragm inevitably changes the magnetic and electrical characteristics of the loudspeaker. A numerical time-domain model capable of describing these nonlinearities is presented. By simulation it is demonstrated how the output distortion could potentially be reduced significantly through careful design of the mechanical properties of the armature.
Original languageEnglish
JournalJournal of the Audio Engineering Society
Volume59
Issue number3
Pages (from-to)91-101
ISSN1549-4950
Publication statusPublished - 2011

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